Grid line structure, solar cell, cell module and photovoltaic system

The utility model is suitable for the technical field of solar cells, and provides a grid line structure, a solar cell sheet, a cell assembly and a photovoltaic system, a main grid of the grid line structure comprises a first aluminum main grid line and a second aluminum main grid line which are arranged at an interval along a first direction, and the first aluminum main grid line and the second aluminum main grid line extend along a second direction, the second direction intersects the first direction. The plurality of silver electrodes are arranged between the first aluminum main grid lines and the second aluminum main grid lines and are arranged at intervals in the second direction, and the first aluminum main grid lines are higher than the silver electrodes. The auxiliary grid comprises a plurality of first aluminum auxiliary grid lines and at least one second aluminum auxiliary grid line, the first aluminum auxiliary grid lines are connected to the two sides of the main grid, and the second aluminum auxi